JP2630205B2 - Combustion equipment - Google Patents
Combustion equipmentInfo
- Publication number
- JP2630205B2 JP2630205B2 JP5189373A JP18937393A JP2630205B2 JP 2630205 B2 JP2630205 B2 JP 2630205B2 JP 5189373 A JP5189373 A JP 5189373A JP 18937393 A JP18937393 A JP 18937393A JP 2630205 B2 JP2630205 B2 JP 2630205B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- gas
- combustion
- flame
- rich
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、低ＮＯｘ化と共に燃焼
の安定化を計った燃焼装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus which stabilizes combustion while reducing NOx.
【０００２】[0002]
【従来の技術】従来の燃焼方式において、燃焼火炎に局
所的に高温部が発生してＮＯｘが生成される問題を解決
するため、その対策の一つとして濃淡燃焼方式があり、
局所的高温部の発生をなくしてＮＯｘの低減に有効なも
のである。2. Description of the Related Art In order to solve the problem that a high temperature portion is locally generated in a combustion flame and NOx is generated in a conventional combustion system, one of the countermeasures is a gray-scale combustion system.
This is effective in reducing NOx by eliminating the occurrence of local high-temperature portions.
【０００３】この濃淡燃焼方式を適用した燃焼装置とし
て、板金製の燃焼管を複数本並設して構成したものがあ
り、構造が簡単で安価に構成でき、低ＮＯｘ燃焼装置と
して有利なものである。[0003] As a combustion device to which this rich-and-shallow combustion method is applied, there is a combustion device in which a plurality of sheet metal combustion tubes are arranged side by side, and the structure is simple and inexpensive, and is advantageous as a low NOx combustion device. is there.
【０００４】この燃焼装置として、例えば図３および図
４に示すように、燃焼管１１の両側部に濃ガス室１２を
形成して上面に濃側炎孔１３を設け、中央部に上部を開
口した淡側混合室１４を形成し、上面に仕切板１５を並
設して淡側炎口１６を設け、淡側混合室１４を空気口１
７と連通し、濃ガス室１２に空気過剰率の低い濃ガスを
供給するようにすると共に、濃ガス室１２と淡側混合室
１４とを淡側用ガス噴出孔１８により連通して淡側混合
室１４に濃ガスを供給し、空気口１７からの空気と混合
して淡側混合室１４において空気過剰率の高い淡ガスを
生成し、中央部に淡側火炎、両側部に濃側火炎を形成す
るようにしたものがある。このような燃焼装置は、中央
部の淡側火炎を両側部の濃側火炎の保炎効果により、燃
焼を安定化することができる。As this combustion device, for example, as shown in FIGS. 3 and 4, a dense gas chamber 12 is formed on both sides of a combustion tube 11, a dense flame hole 13 is provided on an upper surface, and an upper portion is opened at a central portion. A light side mixing chamber 14 is formed, a partition plate 15 is arranged on the upper surface, a light side flame port 16 is provided, and the light side mixing chamber 14 is
7 and a concentrated gas having a low excess air ratio is supplied to the concentrated gas chamber 12, and the concentrated gas chamber 12 and the light-side mixing chamber 14 are communicated with each other by a light-side gas discharge hole 18. A rich gas is supplied to the mixing chamber 14 and mixed with air from the air port 17 to generate a light gas with a high excess air ratio in the light-side mixing chamber 14, a light-side flame in the center and a rich-side flame in both sides. Is formed. Such a combustion device can stabilize combustion by the flame holding effect of the light flame at the center and the dark flame at both sides.
【０００５】[0005]
【発明が解決しようとする課題】ところが、前述の燃焼
管１１において、その長手方向両端部Ａには燃焼管１１
の構成上濃側炎孔を設けることが困難であるため、両端
部Ａの淡側火炎がリフトし易いという問題を有してい
た。However, in the above-described combustion tube 11, the combustion tube 11
Since it is difficult to provide the deep side flame hole due to the above structure, there is a problem that the light side flame at both ends A is easily lifted.
【０００６】本発明は、上記問題点を解決し、燃焼管の
長手方向両端部の淡側火炎のリフトを防止し、燃焼を安
定化する燃焼装置の提供を目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a combustion apparatus for preventing a light flame from being lifted at both longitudinal ends of a combustion tube and stabilizing combustion.
【０００７】[0007]
【課題を解決するための手段】本発明の燃焼装置は、上
記目的を達成するために、両側部に濃ガス室を形成し、
上面に濃側炎孔を設けると共に、中央部に空気口と連通
した淡側混合室を形成し、上部を開口して上面に淡側炎
孔を設け、濃ガス室と淡側混合室との間を複数の淡側用
ガス噴出孔により連通した燃焼管において、該燃焼管の
長手方向両端部に位置する淡側用ガス噴出孔の孔径を他
の淡側 用ガス噴出孔より大きくしたことを第１の特徴と
している。 また本発明の燃焼装置は、両側部に濃ガス室
を形成し、上面に濃側炎孔 を設けると共に、中央部に空
気口と連通した淡側混合室を形成し、上部を 開口して上
面に淡側炎孔を設け、濃ガス室と淡側混合室との間を複
数の淡 側用ガス噴出孔により連通した燃焼管において、
該燃焼管の長手方向両端 部に位置する淡側用ガス噴出孔
と隣り合う淡側用ガス噴出孔との間隔を他 の淡側用ガス
噴出孔の間隔より小さくしたことを第２の特徴としてい
る。 In order to achieve the above object, the combustion apparatus according to the present invention has dense gas chambers formed on both sides,
In addition to providing a rich-side flame hole on the upper surface, a light-side mixing chamber communicating with the air port is formed in the center, and a light-side flame hole is provided on the upper surface by opening the upper part. In a combustion pipe having a plurality of light-side gas ejection holes communicating between the gas tubes, the diameter of the light-side gas ejection holes located at both ends in the longitudinal direction of the combustion tube is changed.
That of larger than pale side gas injection holes first feature and
doing. The combustion device of the present invention has a concentrated gas chamber on both sides.
And a dark side flame hole is provided on the upper surface, and an empty space is provided in the center.
Form a light-side mixing chamber that communicates with the
The light side flame hole is provided on the surface, and the space between the rich gas chamber and the light side mixing chamber is
In the combustion tubes connected by the number of light side gas ejection holes,
Light-side gas ejection holes located at both longitudinal ends of the combustion tube
The gap between the light side gas ejection hole and the adjacent light side gas
The second feature is that it is smaller than the interval between the ejection holes.
You.
【０００８】[0008]
【作用】燃焼時、濃ガス室上面の濃側炎孔に濃側火炎を
形成し、混合室上面の淡側炎口に淡側火炎を形成する。
このとき、燃焼管の長手方向両端部の淡側火炎は、この
両端部に位置する淡側用ガス噴出孔からのガス供給量を
増大しているため、この部分の淡側炎口から噴出する淡
ガスは空気過剰率が低くなり、安定した淡側火炎が形成
されることになって、両側部に濃側火炎が形成されてい
なくてもリフトのない安定した燃焼を得ることができ
る。During combustion, a rich flame is formed in the rich flame hole on the upper surface of the rich gas chamber, and a light flame is formed in the light flame on the upper surface of the mixing chamber.
At this time, since the light-side flames at both ends in the longitudinal direction of the combustion tube have increased the gas supply amount from the light-side gas ejection holes located at the both ends, the light-side flames are ejected from the light-side flame outlets at this portion. The lean gas has a low excess air ratio, and a stable light-side flame is formed. Even if no rich-side flame is formed on both sides, stable combustion without lift can be obtained.
【０００９】[0009]
【実施例】図１は本発明の一実施例を示す要部断面斜視
図である。FIG. 1 is a sectional perspective view of an essential part showing an embodiment of the present invention.
【００１０】１は燃焼管で、両側部に濃ガス室２を形成
し、上面に濃側炎孔３を設けると共に、中央部に淡側混
合室４を形成し、淡側混合室４は下部に設けた空気口５
と連通し、上部を開口して上面に並設した仕切板６によ
り淡側炎口７を形成している。８は濃ガス室２に連通す
る濃側混合室で、燃料ガスと１次空気とを混合し、空気
過剰率の低い濃ガスを生成する。９は濃ガス室２と淡側
混合室４とを連通する淡側用ガス噴出孔で、濃ガスを淡
側混合室４内に噴出し、空気口５から導入される空気と
混合して空気過剰率の高い淡ガスを生成する。この淡側
用ガス噴出孔９は、燃焼管１の長手方向全長に亘って一
定間隔で複数個設けてあり、燃焼管１の長手方向両端部
に位置する淡側用ガス噴出孔１０はその穴径を大きくし
て濃ガス供給量を増大している。Reference numeral 1 denotes a combustion tube, in which a dense gas chamber 2 is formed on both sides, a dense flame hole 3 is provided on the upper surface, and a light mixing chamber 4 is formed in the center, and the light mixing chamber 4 is a lower part. Air port 5 provided in
A light-side flame port 7 is formed by a partition plate 6 which is open at the upper part and is juxtaposed on the upper surface. Reference numeral 8 denotes a rich side mixing chamber communicating with the rich gas chamber 2, which mixes the fuel gas with the primary air to generate a rich gas having a low excess air ratio. Reference numeral 9 denotes a light gas outlet for the light side which communicates the rich gas chamber 2 and the light side mixing chamber 4, and blows out the rich gas into the light side mixing chamber 4, mixes with the air introduced from the air port 5, and air Produces a high excess of lean gas. A plurality of the light-side gas jet holes 9 are provided at regular intervals over the entire length of the combustion tube 1 in the longitudinal direction, and the light-side gas jet holes 10 located at both ends in the longitudinal direction of the combustion tube 1 are provided with the holes. The diameter is increased to increase the supply of concentrated gas.
【００１１】尚、燃焼管１の長手方向両端部の淡側用ガ
ス供給量を増大する手段として前述のように淡側用ガス
噴出孔１０の穴径を大きくする以外に、図２に示すよう
に穴径は同一でも両端部の淡側用ガス噴出孔１０の間隔
ｙを他の淡側用ガス噴出孔９の間隔ｘより小さくして実
質的に両端部分のガス噴出量を大きくしてもよく、要す
るに両端部の濃ガス供給量を増大するようにすればよ
い。As means for increasing the supply amount of the light gas for the light side at both ends in the longitudinal direction of the combustion tube 1, other than increasing the diameter of the gas injection hole 10 for the light side as described above, as shown in FIG. Even if the hole diameter is the same, even if the distance y between the light-side gas ejection holes 10 at both ends is smaller than the space x between the other light-side gas ejection holes 9, the gas ejection amount at both ends is substantially increased. In short, it suffices to increase the supply amount of concentrated gas at both ends.
【００１２】このように構成した燃焼装置は、燃焼時、
濃ガス室２内の濃ガスが濃側炎孔３から噴出燃焼して濃
側火炎を形成すると共に、淡側用ガス噴出孔９、１０か
ら淡側混合室４内に噴出し、空気口５からの空気と混合
して淡ガスを生成し、淡側炎口７上面に淡側火炎を形成
する。淡側火炎は濃側火炎の保炎効果により、燃焼を安
定化するが、燃焼管１の長手方向両端部は濃側炎孔３が
なく、その保炎効果を期待できない。しかし両端部の淡
側用ガス噴出孔１０よりの濃ガス供給量を増大している
ため、この部分の淡側炎口７から噴出する淡ガスは空気
過剰率が低くなり、淡側火炎の両端部に濃い火炎か形成
されることになり、安定した燃焼を得ることができ、リ
フトによる未燃ガスの排出も抑制される。[0012] The combustion apparatus having the above-described structure is capable of burning
The rich gas in the rich gas chamber 2 is blown out and burned from the rich side flame hole 3 to form a rich side flame, and is blown out from the light side gas blowing holes 9, 10 into the light side mixing chamber 4, and the air port 5 is formed. The gas is mixed with the air from the above to generate a light gas, and a light flame is formed on the upper surface of the light flame port 7. The light flame stabilizes the combustion by the flame holding effect of the rich flame. However, both ends of the combustion tube 1 in the longitudinal direction do not have the deep flame hole 3, and the flame holding effect cannot be expected. However, since the supply amount of the concentrated gas from the gas discharge holes 10 for the light side at both ends is increased, the excess gas of the gas discharged from the light side flame port 7 at this portion has a low excess air rate, Since a thick flame is formed in the portion, stable combustion can be obtained, and emission of unburned gas by the lift is suppressed.
【００１３】[0013]
【発明の効果】本発明は以上のように、燃焼管の長手方
向両端部に位置する淡側用ガス噴出孔からのガス供給量
を増大するようにしたので、両端部の淡側火炎は濃い火
炎となり、両側に濃側火炎がなくてもリフトせず、安定
した燃焼を得ることができる。As described above, according to the present invention, the amount of gas supply from the light-side gas ejection holes located at both ends in the longitudinal direction of the combustion tube is increased, so that the light-side flame at both ends is dense. It becomes a flame and does not lift even if there is no rich flame on both sides, so that stable combustion can be obtained.
【図１】本発明の一実施例を示す要部断面斜視図であ
る。FIG. 1 is a sectional perspective view showing a main part of an embodiment of the present invention.
【図２】淡側用ガス噴出孔の間隔を小さくした他の実施
例を示す要部断面斜視図である。FIG. 2 is a cross-sectional perspective view of a main part showing another embodiment in which the interval between the light-side gas ejection holes is reduced.
【図３】従来例を示す要部断面斜視図である。FIG. 3 is a cross-sectional perspective view of a main part showing a conventional example.
【図４】同例の要部平面図である。FIG. 4 is a plan view of a main part of the same example.
１ 燃焼管 ２ 濃ガス室 ３ 濃側炎孔 ４ 淡側混合室 ７ 淡側炎口 ９ 淡側用ガス噴出孔 １０ 淡側用ガス噴出孔 DESCRIPTION OF SYMBOLS 1 Combustion pipe 2 Rich gas chamber 3 Rich side flame hole 4 Light side mixing chamber 7 Light side flame hole 9 Light side gas vent hole 10 Light side gas vent hole
Claims (2)
炎孔を設けると共に、中央部に空気口と連通した淡側混
合室を形成し、上部を開口して上面に淡側炎孔を設け、
濃ガス室と淡側混合室との間を複数の淡側用ガス噴出孔
により連通した燃焼管において、該燃焼管の長手方向両
端部に位置する淡側用ガス噴出孔の孔径を他の淡側用ガ
ス噴出孔より大きくし たことを特徴とする燃焼装置。1. A rich gas chamber is formed on both sides, a rich-side flame hole is provided on the upper surface, and a light-side mixing chamber communicating with an air port is formed in the center. With a flame hole,
In a combustion tube in which the rich gas chamber and the light-side mixing chamber communicate with each other by a plurality of light-side gas discharge holes, the diameter of the light-side gas discharge holes located at both ends in the longitudinal direction of the combustion tube is changed to another light- gas discharge hole. Side moth
A combustion device characterized in that it is larger than a gas outlet .
炎孔を設けるとWith a flame hole 共に、中央部に空気口と連通した淡側混In both cases, the light side mixture that communicates with the air port in the center
合室を形成し、上部を開口してForm a joint room, open the top 上面に淡側炎孔を設け、A light side flame hole is provided on the upper surface,
濃ガス室と淡側混合室との間を複数の淡側用ガMultiple light-side gas chambers are located between the rich gas chamber and the light-side mixing chamber. ス噴出孔Spout
により連通した燃焼管において、該燃焼管の長手方向両The combustion tubes communicate with each other in the longitudinal direction of the combustion tubes.
端部にAt the end 位置する淡側用ガス噴出孔と隣り合う淡側用ガスLight side gas adjacent to the located light side gas outlet
噴出孔との間隔を他のIf the distance between the orifice and other 淡側用ガス噴出孔の間隔より小さSmaller than the gap between the gas outlets for light side
くしたことを特徴とする燃焼装置。Combustion device characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5189373A JP2630205B2 (en) | 1993-06-30 | 1993-06-30 | Combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5189373A JP2630205B2 (en) | 1993-06-30 | 1993-06-30 | Combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0742913A JPH0742913A (en) | 1995-02-10 |
| JP2630205B2 true JP2630205B2 (en) | 1997-07-16 |
Family
ID=16240237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5189373A Expired - Fee Related JP2630205B2 (en) | 1993-06-30 | 1993-06-30 | Combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2630205B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4727712B2 (en) * | 2008-12-04 | 2011-07-20 | エスペック株式会社 | Ventilation device |
| CN103162290B (en) | 2011-12-09 | 2016-08-03 | 株式会社能率 | Rich-lean combustion burner and burner |
| CN103185339B (en) | 2011-12-28 | 2016-08-03 | 株式会社能率 | Rich-lean combustion burner and burner |
| KR101468940B1 (en) * | 2013-11-15 | 2014-12-04 | 주식회사 경동나비엔 | Lean rich combustion apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022534B2 (en) * | 1977-01-13 | 1985-06-03 | ソニー株式会社 | Chuyuna |
| JPH04124512A (en) * | 1990-09-14 | 1992-04-24 | Matsushita Electric Ind Co Ltd | Low nox burner |
-
1993
- 1993-06-30 JP JP5189373A patent/JP2630205B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0742913A (en) | 1995-02-10 |
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